Then you don't want ANY monster description then? Statblock only? Because ANY description someone writes is going to be counter to someone's idea of what a goblin is.
Actually, I want a MULTITUDE of descriptions, and an explicit acknowledgement that this is only one possible example of what a goblin might be.
If there is to be a
Monster Manual for 5e that is an alphabetical listing of various monsters (and there are reasons why I think there shouldn't be, but we'll put those aside for the moment), then under
Goblin, there should be an example of, say, the Goblins of the Nentir Vale, and maybe those guys are a little funny and are mounted on sick dogs, but nowhere does it suggest that those goblins define what goblins are for the entire D&D game.
And, heck, if there's room, maybe the next page has the Goblins of Podunk Fields, and they're all like my goblins of darkness and night-time and baby-murder. Or maybe the Goblins of Eberron, and they're heirs to a great lost empire....
All those are D&D goblins. So is whatever version or custom type you use in your game. The monster design shouldn't presume that the D&D goblin is one thing, or even
mostly one thing. And those goblins deserve to be mechanically distinct, too -- goofy goblins have a
Pumpkin Chuckin' power and high DEX, and Podunk Field goblins have a
Fade into Darkness power and a good Stealth skill, and Eberron goblins have a
Pride in Defeat power and a decent INT (or whatever).
And if there's not room for a sampling, the one goblin that gets to be in the MM, should still not pretend like it's the D&D goblin, and should still be a specific type of goblin. Even if you have only one goblin, it should be ONE of those goblins, not "Goblins in D&D are like THIS!", but "This goblin is like this, and you can use it in your game if you want!"